To avoid the tendency of separation of liquid flow, the most suitable ratio of t

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Question
To avoid the tendency of separation of liquid flow, the most suitable ratio of the diameters of the throat and the pipe, is
Options
A. 1/4 to 1/8
B. 1/3 to 1/2
C. 1/2 to 3/4.
D. none of these.

Correct Answer

1/3 to 1/2

Hydraulics problems

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2. The flow is called rotational if its velocity normal to the plane of area is equal to
Options
A. angular velocity vector
B. twice the angular velocity vector
C. thrice the angular velocity vector
D. none of these.

3. Hydraulic grade line
Options
A. remains above the centre line of conduit
B. remains below the centre line of conduit
C. remains parallel to the centre line of conduit
D. may be above or below the centre line of conduit.

7. On a flow net diagram, the distance between two consecutive steam lines at two successive sections are 1 cm and 0.5 cm respectively. If the velocity at the first section is 1 m/sec, the velocity at the second is
Options
A. 1.0 m/sec
B. 0.5 m/sec
C. 2.0 m/sec
D. 2.5 m/sec
E. 3 m/sec.

8. Discharge with velocity of approach, over a rectangular weir is
Options
A. C_d x L x 2g [(H + ha)^3/2 + ha^3/2]
B. C_d x L x 2g [(H + ha)^3/2 - ha^3/2]
C. C_d x L x 2g [(H - ha)^3/2 + ha^3/2]
D. C_d x L x 2g [(H - ha)^3/2 - ha^3/2]

9. Hydraulic radius is equal to
Options
A. area divided by the square of wetted perimeter
B. area divided by wetted perimeter
C. wetted perimeter divided by area
D. square root of the area.

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